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<script>
    function Tank() {
        this.color = 'red'
        this.dom = null;
    }
    function son() {
        Tank.call(this)
    }
    son.prototype.run = function () {
        console.log('我是组合继承的，别打我，，我有两个爹');
    }
    let a = new son()
    console.log(a);
</script>